linux-kernel - [PATCH 3/4] dt-bindings: can: renesas,rcar-canfd: Document RZ/T2H and RZ/N2H SoCs

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Message-ID: <20251224173324.3393675-4-prabhakar.mahadev-lad.rj@bp.renesas.com>
Date: Wed, 24 Dec 2025 17:33:23 +0000
From: Prabhakar <prabhakar.csengg@...il.com>
To: Marc Kleine-Budde <mkl@...gutronix.de>,
	Vincent Mailhol <mailhol@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	Magnus Damm <magnus.damm@...il.com>,
	Biju Das <biju.das.jz@...renesas.com>
Cc: linux-can@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-renesas-soc@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Prabhakar <prabhakar.csengg@...il.com>,
	Fabrizio Castro <fabrizio.castro.jz@...esas.com>,
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: [PATCH 3/4] dt-bindings: can: renesas,rcar-canfd: Document RZ/T2H and RZ/N2H SoCs

From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>

Document the CAN-FD controller used on the RZ/T2H and RZ/N2H SoCs. The
CAN-FD IP is largely compatible with the R-Car Gen4 block, but differs
in that AFLPN and CFTML are different, there is no reset line for the IP,
and it only supports two channels.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
---
 .../bindings/net/can/renesas,rcar-canfd.yaml  | 26 ++++++++++++++++++-
 1 file changed, 25 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/net/can/renesas,rcar-canfd.yaml b/Documentation/devicetree/bindings/net/can/renesas,rcar-canfd.yaml
index 393b0a15c7b3..a4c6b2002127 100644
--- a/Documentation/devicetree/bindings/net/can/renesas,rcar-canfd.yaml
+++ b/Documentation/devicetree/bindings/net/can/renesas,rcar-canfd.yaml
@@ -50,6 +50,12 @@ properties:
               - renesas,r9a09g057-canfd     # RZ/V2H(P)
           - const: renesas,r9a09g047-canfd
 
+      - const: renesas,r9a09g077-canfd      # RZ/T2H
+
+      - items:
+          - const: renesas,r9a09g087-canfd  # RZ/N2H
+          - const: renesas,r9a09g077-canfd
+
   reg:
     maxItems: 1
 
@@ -166,7 +172,6 @@ required:
   - clocks
   - clock-names
   - power-domains
-  - resets
   - assigned-clocks
   - assigned-clock-rates
   - channel0
@@ -246,11 +251,30 @@ allOf:
       required:
         - reset-names
 
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: renesas,r9a09g077-canfd
+    then:
+      properties:
+        interrupts:
+          maxItems: 8
+
+        interrupt-names:
+          maxItems: 8
+
+        resets: false
+    else:
+      required:
+        - resets
+
   - if:
       properties:
         compatible:
           contains:
             enum:
+              - renesas,r9a09g077-canfd
               - renesas,rcar-gen3-canfd
               - renesas,rzg2l-canfd
     then:
-- 
2.52.0